Jump to content
Ultimate Subaru Message Board

EA81T engine dies


Recommended Posts

I think codes 11 and 12 are fairly normal if you have the connectors plugged together and the engine not running, but the ignition switch in the on position. Does the car run alright for the first minute or so from cold startup, and then play up after it has warmed up slightly. If so, I'd check the O2 sensor. Had similar with my EA82T. Would run perfectly for about 1 minute after cold start, then cough splutter and carry on after that. Turned out the 02 sensor wasn't totally dead, but was giving incorrect readings stuffing everything up, but not bad enough to trigger the ECS light. In my case simply unplugging the 02 sensor made it run heaps better so it was easy to work out what it was. Other than that I'd be having a close look at the engine Temp sensor.

Link to comment
Share on other sites

Hey guys, I saw this thead and just wanted to give my 2 cents. a bad oxygen sensor will not keep a vehicle from idling, you could actually unplug the O2 sensor, and it will run... when the O2 sensor goes out you mainly notice a loss of power on acceleration and at higher speeds (aka surging on the freeway). Since it starts up fine cold, and then dies after its warm, then its definetly related to the computer running open loop. My advice is to checkout perhaps the knock sensor, or the Mass air flow sensor. the sensor probably isnt giving a worth didily reading unless you open the throttle body to move the vane back far enough to where it gives SOME kind of reading again. on the other hand if the knock sensor is messed up, that can also cause it to starve itself of fuel.

 

Its highly unlikely that an o2 sensor or a water temp sensor will cause the engine to stop running all together.

Link to comment
Share on other sites

Skip suggested to me that the dash pot is out of adjustment. that might explain why it dies when im coasting to a stop. but that doesnt explain why it doesnt like to restart when its hot. after looking at my trouble shooting trees in my FSMs, I think that if the wiring related to the trouble codes im getting isnt bad, then I think the ECU is poopy, but if that were the case, it wouldn't run, so I think its the wiring.

Link to comment
Share on other sites

Galen, your email said nothing about not starting after it dies.

Tuff troubleshooting with half the info -

homework needed

When you have the car in a no start situation

pop the hood and use a helper or a remote start switch and check the spark with the coil wire, it should be blue white and atleast a half inch long.

This will atleast be a start as to what is giving you problems.

 

Coil or spark generating circuits

or

fuel delivery

Link to comment
Share on other sites

  • 2 weeks later...

well the trouble shooting trees in the FSM tell me that I need a new computer. But the codes im getting say ignition problem. i have a old MSD coil on the car, do you think it is toast and not giving a good spark? the engine also gives a noise like a knocking rod that gets quieter as the car warms up and drops idle. it is LOUD when you first hit the gas then mellows out at higher RPM. My Dad says he has little experince with knocking rods but after using the automotive stethiscope, he is pretty sure it sint a knocking rod because there is no noise at the crank but it is loud on the intake manifold and at the back of the block/ bellhousing. Is this a knocking rod? I had to drop the oil pan and put a new one on, so the pan was off for a while, could this lack of oil in the engine caused a knocking rod at startup? didnt used to make this noise.

Link to comment
Share on other sites

Theres a whole slew of things to address..I will only advise on the ones I know.

 

1. Car dying when warm and not restarting. These are classic symptoms of a bad coil or ignition amplifier.

2. Knocking. without more info, its hard to tell. Maybe one of the more experienced local guys can give it a listen for you.. But check the obvious external things like the water pump(they can make some funky noises when they're on the way out.) Also, if there is a knock, it will play hell with your knock sensor and the readings it is sending.

Link to comment
Share on other sites

I had one of mine when warmed up would quit and not start. It turned out to the fuel pressure regulator. This is not a cheap item from the dealer either over $700.00. I took one off of my other car before I got a used one to make sure it was the problem. Don't know it this is your problem but it is a possibility. I was lucky to find one in a wrecking yard for mine for $45.

cjt

Link to comment
Share on other sites

Originally posted by whippet

I had one of mine when warmed up would quit and not start. It turned out to the fuel pressure regulator. This is not a cheap item from the dealer either over $700.00. I took one off of my other car before I got a used one to make sure it was the problem. Don't know it this is your problem but it is a possibility. I was lucky to find one in a wrecking yard for mine for $45.

cjt

 

$700? for what car? they arent that much for our old soobies.. at least not around here

Link to comment
Share on other sites

This was for an EA81T engine from the Subaru dealer. 83 turbo wagon. The parts person when looking up the part and finding the price was totally shocked. I also checked more than one dealer. The part comes with the lines going to each injector so it looks like a spider.

 

cjt

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...